Chain door-check.



PATENTED-JUNE 9, 1908. J. KLEIDMANN. I CHAIN DOOR CHECK. APPLICATIONFILED MAY 29'. 1907.

WITNESSES Mag;

ATTORNEYS UNITED STATES PATENT OFFICE JOSEPH KLEIDMANN, OF NEW YORK, N.Y., ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO CHAFEE MANUFACTURINGCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

CHAIN D COR-CHE OK.

Specification of Letters Patent.

Patented June 9, 1908. I

To all whom it may concern:

Be it known that I, JOSEPH KLEIDMANN, a subject of the Czar of Russia,and a resident of the city of New York, borough of Brooklyn', in thecounty of Kings and State of New York,'have invented a new and ImprovedChain Door-Check, of which the following is a full, clear, and exactdescription.

This invention relates to chain door-checks.

The object of the invention is to provide a simple, strong and durabledoor check, which, when in a certain position allows the door to beopened to a predetermined extent, and which, when in another positionserves to lock the door to prevent the same from being opened, evenslightly.

A further object of the invention is to provide a door check to bepermanently attached to the door frame, and having means for removablysecuring the chain to the door at a plurality of points on the chain,whereby in one position of the chain, the door can be opened to acertain extent, and in another position of the chain, the door islocked.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis speciiication, in which similar characters of reference indicatecorresponding parts in all the figures, and in which Figure 1 representsa part of a door-frame and a door showing my device applied thereto;Fig. 2 is an enlarged horizontal crosssection through the door-frame andthe door, showing the chain in position to lock the door; Fig. 3 is anenlarged plan view of a detail; Fig. 4 is an enlarged cross-section onthe line 44 of Fig. 2, and Fig. 5 is a rear view of a part of the deviceshowing certain details of construction.

Before proceeding to a more detailed explanation of my invention, itshould be understood that it is customary to use door chains to permitthe door to be opened to a certain extent only, preventing the completeopening of the door. The purpose of these chains is to permit a personwithin to investigate an occurrence at the other side of the door,without necessitating the opening of the door wide enough to permitentrance therethrough. The chain of my invention Serves this purpose andat the same time can be used to' lock the door so that it cannot beopened even slightly. To accomplish this double purpose, I provide meansfor removably securing the chain to the door at the end of the chain andat a point intermediate of the length of the chain. The holding meansupon the door operate to draw the chain taut when the latter is engagedwith the holding means at the intermediate point, so that the chainitself serves as a locking means. The door chain may be made of anysuitable metal. It is not necessary to employ a chain proper, as anystrong flexible member serves the purpose; for instance, a short pieceof wire rope.

Referring more particularly to the drawings, 1 represents a door frameand 2 the door. I provide a plate 3 having near the center an integrallateral projection 4, and secured rigidly in position upon the doorframeby means of screws 5 arranged in suitable openings in the plate. Theprojection 4 has therethrough an opening 6. The opening 6 is taperedoutwardly at the ends, and located in the same is the end link 8 of thechain 9. By tapering the ends of the opening through the projection 4,the chain can swing more freely in the projection. The latter, further,has a stud or pin 10 upon which the free end of the chain may be hungwhen the chain is not in use. At the free end, the chain 9 has anannular eye 11, presenting a second eye 12 by means of which it ismounted to the chain at the end link 7 of the latter. The eye 1 1 ispreferably formed from sheet metal, and the eye opening therethrough issubstantially circular. A second similar eye 13 having an extension 14is mounted at a link intermediate the ends of the chain.

I provide a holding bracket 15 secured rigidly in position upon the doorby means of screws 16 arranged in suitable openings in the plate. An arm17 is pivotally mounted by means of a stud 17 in an opening formedtherefor in the bracket plate 15 and extending through the latter. Thearm 17 at a point adjacent to the outer face of the bracket plate has anintegral cam 18 comprising substantially a circular disk eccentric withthe stud 17*. At the outer edge of the disk is formed a flange 18preferably eccentric with the circular disk. This flange has itsmechanism extending beyond the disk at the point of greatesteccentricity of the latdisplacement.

ter.

Beyond the cam, the arm 17 is laterally disposed and is so formed thatit can be easily grasped in the hand for manual operation. The stud 1'7at the outer extremity is provided with a tapered head. The latter iscountersunk in the opening through the bracket plate which is suitablyformed to receive the head. The head holds the arm in position withrespect to the bracket plate while permitting its rotation in a planesubstantially parallel to the bracket plate. The latter has an integralextension 19 rovided with a recess 20 inclined toward tie plate. Therecess serves to engage the arm 17 near the end thereof to hold itagainst accidental The arm normally does not engage the recess untilforced slightly to one side. In this way the arm constitutes a springwhereby. it is held more firmly in the recess.

When the eye 11 of the chain is in engagement with the holding arm, thedoor can be opened to a certain extent, as is usually the case withdoor-chains of ordinary types. When it is desired to lock the door, theeye 13 is engaged with the arm, which is pivotally operated toward thedoor-frame to permit the eye to be slipped thereupon. When the eye 15arranged. upon the cam 18 the arm is swung into engagement with therecess 20 of the extension 19. The throw of the cam is in the directionof the extension 19 and by swinging the arm in this direction, thechain, between the eye 13 and the point of attachment to the door frame,is drawn quite taut, the tautly stretched chain securely attached to thedoor-frame constituting locking means to prevent the opening of thedoor, even slightly. The flange 18 of the eccentric on the arm serves tohold the eye in position thereupon.

Having thus described my invention I claim as new, and desire to secureby Letters Patent 1. A device of the class described, comprising a chainadapted to be permanently attached to the door-frame and having aplurality of holdin eyes, and a holding racket adapted to be permanentlysecured to the door and having a pivoted arm for engaging said eyes,said arm being provided with a cam adapted to be operated to engage oneof said eyes, whereby said chain is drawn taut when said arm is swungabout its pivotal point.

2. A device of the class described, comprising a chain adapted to beattached to the door-frame and having a holding eye at the end thereof,and a second holding eye intermediate of the length of said chain, and aholding bracket having a pivoted arm provided with a cam adapted toengage said holding eyes, said bracket having an extension with a recessadapted to engage said arm to hold the same in position, said arm beingswung laterally when in engagement with said recess, said cam having athrow in the direction of said extension, whereby said chain is drawntaut when said arm is swung about its pivotal point toward saidextension.

3. A device of the class described, comprising a chain adapted to beattached to the door-frame and having a holding eye at the end thereofand a second holding eye intermediate of the length of said'chain, and aholding bracket having a pivoted arm provided with a cam adapted toengage said holding eyes, said bracket having an extension with a recessadapted to engage said arm to hold the same in position, the throw ofsaid cam being in-a direction away from the point of attachment of saidchain to the door-frame, said recess being arranged intermediate of saidbracket and said arm, said cam havinga flange at the outer edge to holdsaid eyes in position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH KLEIDMANN.

